"Chicago-style pizza" would be ok, according to the article. But not "Chicago pizza" if it wasn't really from Chicago (and if it was protected by law/treaty, wh

"Chicago-style pizza" would be ok, according to the article. But not "Chicago pizza" if it wasn't really from Chicago (and if it was protected by law/treaty, which I don't think it is). New York City feels rather like a foreign country to me, though the range-of-quality observation is indeed true everywhere in the US.